I am 5 feet 11 inches tall and weigh about 95 kilograms. Is it advisable to jog/run for 20 minutes a day? Do i risk injuring my knees?
The idea behind runnning is to loose weight and gain a lot of endurance and stamina. 
I have been doing squats and lunges to strengthen my leg muscles.

EDIT:
I would like to ask the similar question about skipping/jump ropes. Would jumping for about 2 minutes every day (about 100 jumps) cause serious longterm injuries? I find jumping ropes very enjoyable exercise, but I sometimes get dull ache (stiffness) just above the knees and hence the question